America suffered another horrible mass shooting yesterday. A discharged Navy reservist and current military contractor shot up a Navy Yard in Washington D.C., killing 12 people and injuring 8 more.

The gunman was 34-year-old Aaron Alexis of Fort Worth, Texas. It was a little after eight in the morning, and he was armed with an AR-15 semi-automatic rifle, another rifle, and a semi-automatic Glock handgun.

He was killed during the shootout too, although it's not clear who shot him. Initially there were reports that there was a SECOND gunman, and that FOURTEEN people had been injured.

Alexis was discharged from the Naval reserves in 2011 for a, quote, "pattern of misconduct." The Navy is reviewing his files now. He has been working as an IT contractor for the Navy.

His motive for the shooting is still unknown, but there's no evidence that he was a terrorist or working with any terrorist groups.

Back in 2004, he was arrested for shooting a neighbor's tires after a fight. He told detectives he, quote, "blacked out" during the shooting. He was also arrested in Texas in 2010 for illegally discharging a gun when he accidentally shot his ceiling.

The Washington Navy Yard is the headquarters of the Naval Sea Systems Command and the Navy's oldest land base. It was created in 1799 and burned during the War of 1812. About 3,000 people work there.

There are details on eight of the 12 people killed in the shooting. None of them were military personnel. Since everyone's going to be talking about the filth who took their lives, let's take a moment to focus on the victims.